RT Journal Article
T1 Laser beam deflectometry based on a subpixel resolution algorithm
A1 Canabal Boutureira, Héctor Alfonso
A1 Alonso Fernández, José
A1 Bernabéu Martínez, Eusebio
AB A deflectometric method for the characterization of optical systems is presented. It is based on the use of a CCD camera and a subpixel resolution algorithm for the measurement of the deflection of a laser beam that propagates through the system. To obtain accurate results, three different algorithms for measuring the position of the deflected beam are tested and compared. Based on this comparison, an algorithm based on the calculation of the phase of the fast Fourier transform (FFT) is selected, and an accuracy of 0.024 pixels is obtained on the determination of the beam position in our setup. Using an XY scanning stage, the proposed method is completely automated and applied for the characterization of ophthalmic lenses. In this application, the gradients of the wavefront refracted by the lens are measured directly, and from them, the thickness and the local power of the lens are computed.
PB Spie-Soc Photo-Optical Instrumentation Engineers
SN 0091-3286
YR 2001
FD 2001-11
LK https://hdl.handle.net/20.500.14352/59220
UL https://hdl.handle.net/20.500.14352/59220
NO Canabal Boutureira, H., Alonso Fernández, J., Bernabéu Martínez, E.  «Laser beam deflectrometry based on a subpixel resolution algorithm». Optical Engineering, vol. 40, n.o 11, noviembre de 2001, pp. 2517-23. www.spiedigitallibrary.org, https://doi.org/10.1117/1.1409939.
NO Comisión Interministerial de Ciencia y Tecnología (España)
DS Docta Complutense
RD 25 ago 2024